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Alien stars found in our Milky Way | Space

May 25, 2021
Infrared image of stars at the center of our Milky Way galaxy, via the Spitzer Space Telescope. Observing in infrared makes it possible to peer behind the gas clouds that otherwise cover the central region of the galaxy. There are around 10 million stars within just 3.3 light-years of the galactic center. These are dominated by red giants, the same kind of old stars found to be from another galaxy in this study. Image via NASA/ JPL-Caltech/ S. Stolovy (SSC/Caltech).
Astronomers used a new technique – asteroseismology combined with spectroscopy – to pinpoint the ages of a sample of around 100 old red giant stars in the Milky Way. They were able to reach a much higher accuracy of the stars’ ages, they said in a statement on May 17, 2021. And they also found that a number of those red giant stars did not originate in the Milky Way! They are instead alien stars, which came here from another galaxy. Their original home in space was Gaia Enceladus (also known ....

Andrea Miglio , Gaia Enceladus , Josefina Montalb , University Of Birmingham , University Of Bologna , Milky Way , Spitzer Space Telescope , Gaia Sausage , Mathieu Vrard , Ohio State , பல்கலைக்கழகம் ஆஃப் பர்மிங்காம் , பல்கலைக்கழகம் ஆஃப் போலோக்னா , பால் வழி , ஸ்பிட்சர் இடம் தொலைநோக்கி , கியா தொத்திறைச்சி , ஓஹியோ நிலை ,

We Finally Know How Old The Stars Are, Say Scientists (And When We Collided With A Cosmic 'Sausage')

We Finally Know How Old The Stars Are, Say Scientists (And When We Collided With A Cosmic 'Sausage')
forbes.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from forbes.com Daily Mail and Mail on Sunday newspapers.

Andrea Miglio , Josefina Montalb , University Of Birmingham , University Of Bologna , Milky Way , Nature Astronomy , Professor Andrea Miglio , Gaia Enceladus Sausage , How Old Are The Stars , பல்கலைக்கழகம் ஆஃப் பர்மிங்காம் , பல்கலைக்கழகம் ஆஃப் போலோக்னா , பால் வழி , இயற்கை வானியல் ,

Dating the stars: most accurate red giant age yet

Dating the stars: most accurate red giant age yet
Scientists identify stars leftover from cosmic collision.
Artist s impression of the structure of a solar-like star and a red giant. The two images are not to scale - the scale is given in the lower right corner. Credit: Wikimedia Commons.
Researchers have successfully dated some of our galaxy’s oldest stars back to a cosmic collision, using data on their oscillations and chemical composition.
The team, led by Josefina Montalbán of the University of Birmingham, UK, investigated the age of some red giant stars that were originally part of a satellite dwarf galaxy called Gaia-Enceladus, which collided with the Milky Way 11.5 billion years ago. ....

United Kingdom , Andrea Miglio , Josefina Montalb , University Of Birmingham , University Of Bologna , Milky Way , Nature Astronomy , ஒன்றுபட்டது கிஂக்டம் , பல்கலைக்கழகம் ஆஃப் பர்மிங்காம் , பல்கலைக்கழகம் ஆஃப் போலோக்னா , பால் வழி , இயற்கை வானியல் ,

Milky Way: Our galaxy had a sizable fraction of its stars when it hit another 10BILLION years ago

Milky Way: Our galaxy had a sizable fraction of its stars when it hit another 10BILLION years ago
dailymail.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from dailymail.co.uk Daily Mail and Mail on Sunday newspapers.

United States , New Mexico , Apache Point Observatory , Ohio State University , Mathieu Vrard , Fiorenzo Vincenzo , Jonay Gonz , Josefina Montalb , Rafael Rebolo , University Of Birmingham , Milky Way , Gaia Sausage , Ohio State , Instituto De Astrof , Big Bang , ஒன்றுபட்டது மாநிலங்களில் , புதியது மெக்ஸிகோ , அப்பாச்சி பாயஂட் கண்காணிப்பு , ஓஹியோ நிலை பல்கலைக்கழகம் , பல்கலைக்கழகம் ஆஃப் பர்மிங்காம் , பால் வழி , கியா தொத்திறைச்சி , ஓஹியோ நிலை , பெரியது இடி ,

The Milky Way may have grown up faster than astronomers suspected

5 hours ago
The Milky Way as we know it today was shaped by a collision with a dwarf galaxy about 10 billion years ago. But most of the modern galaxy was already in place even at that early date, new research shows.
Nature Astronomy. And that could mean that the Milky Way grew up faster than astronomers expected, says study author Ted Mackereth, an astrophysicist at the University of Toronto.
“The Milky Way had already built up a lot of itself before this big merger happened,” he says.
Our galaxy’s history is one of violent conquest. Like other giant spiral galaxies in the universe, the Milky Way probably built up its bulk by colliding and merging with smaller galaxies over time. Stars from the unfortunate devoured galaxies got mixed into the Milky Way like cream into coffee, making it difficult to figure out what the galaxies were like before they merged. ....

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